Fish oil, cod liver oil, krill oil?

[Blockhead59]

Since I do not like or ever eat fish, I try to take a Vit E type supplement. Any suggestions on which is best for someone who does not eat any kind of fish. I've tried lots of the different supplements, like fish oil, cod liver oil and krill oil for (all in pill form) instance, but I don't know which is best absorbed by the body and is most helpful (brain). Thanks for suggestions or thoughts.